Epson UCF File

• The UCF extension file associated with printer manufacturer Epson Corporation contains personal information settings for the related product. This includes the printer configuration file, which specifies printer paper type, width and length. The file can be opened in various utilities including the user defined paper size (UDPS.exe) utility.
  
  

Xilinx UCF File

• The Xilinx Foundation, which develops programmable logic devices for the semiconductor industry, claims the UCF extension for its user constraint files. These ASCII text files verify constraints in the logical design for programmable chips. The UCF file is created in the UCF Generator and opened in the Constraints Editor.
  
  

WebEx UCF File

• When the UCF file extension is associated with the online phone and video conferencing program called WebEx, it means "Universal Communications Format." The UCF file is used for communicating video, audio, Flash files, Web pages and WebEx recordings during online WebEx sessions. Media content created by other applications is contained in the UCF file. To display UCF file content, the user must have the program associated with the media file.